Peel the avocado, cut into cubes and sprinkle with a few drops lime juice. Cut the limes into wedges and grill them in a boiling pan a couple minutes per side. Cut the feta into cubes.
Mix all the ingredients together, season with a drizzle of oil and a grated pepper and cool it quickly in the blast chiller for 15 minutes in order to consume it cold and to avoid the oxidation of avocado.